/Engine/Plugins/Media/MediaPlayerEditor/Source/MediaPlayerEditor/Public/Widgets/SMediaPlaylistEditorTracks.h
Engine callback to detect when the media is changed.
void OnObjectTransacted ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * Object, const [FTransactionObjectEvent](API\Runtime\CoreUObject\Misc\FTransactionObjectEvent) & TransactionObjectEvent )